Malicious PDF — malware analysis report

Static analysis result for SHA-256 7533e88fcc5b7bdb…

MALICIOUS

PDF

80.7 KB Created: 2021-05-13 07:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4c4ebdb22a39c5ff95308dbf8e8b5939 SHA-1: 98b0f7bd0c6c709c8095896992e524354d3e6e3f SHA-256: 7533e88fcc5b7bdbfccd1aa85be072619528ba407775d430cb91515df4de5347
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm. The primary malicious URL, https://jottigo.ru/strik?utm_term=evangelism+and+the+sovereignty+of+god+ji+packer+pdf, suggests a potential phishing or malware distribution vector. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/strik?utm_term=evangelism+and+the+sovereignty+of+god+ji+packer+pdf PDF link annotation
    • https://tujarabevazedi.weebly.com/uploads/1/3/4/2/134235746/jixej_dobomiwipadazok_ruvar.pdfIn PDF document text
    • http://get3creditscores.info/triton_ii_tr60_sand_filter_partsii4qt.pdfIn PDF document text
    • https://vurikiwuguwek.weebly.com/uploads/1/3/1/4/131408439/986ce19.pdfIn PDF document text
    • http://crubr.space/soundhound_for_pcdcnf9.pdfIn PDF document text
    • https://xukunuwemixul.weebly.com/uploads/1/3/1/3/131384589/nodadukatenowif.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/6734c30ea5fb.pdfIn PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/97be0333fd89e.pdfIn PDF document text
    • https://bikinolij.weebly.com/uploads/1/3/4/5/134514604/dadowemig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_63edb6a0e7f54467a8d74b91306897fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40afe26d-032d-41d4-bbfc-a41439880e6e/29244731788.pdfIn PDF document text
    • https://66166ed5-207d-48ad-a5ac-83b7e977862f.filesusr.com/ugd/0d0d42_d09ca8eaf9114706b312f38d64b6aff7.pdf?index=trueIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_70e103665c5a4079bf3b3b6df23922d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/837066aa-8816-42d2-b2ec-32d8d8e3aaeb/how_to_clean_ionic_pro_blades.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_a436b960db7b420a982f69c99c42fb04.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d540b4-d8ca-49ef-b2cd-3015c4e2d969/4046165110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b4874a-d0f1-4c9a-8e19-9df94170c3c7/why_is_the_light_on_my_battery_charger_blinking_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a9cbd3-b685-466e-b888-ad9e3a8c6c0b/how_to_print_head_alignment_canon_e470.pdfIn PDF document text
    • https://eeff404e-5492-4914-a1d7-e39d1f35e6b2.filesusr.com/ugd/e58d70_8e26c51e694749bea0d41585856014ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/466c1260-45bc-48cb-b5d4-b63c53e62ef7/why_is_my_hotpoint_washing_machine_so_loud_when_spinning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9febfc2-c07e-4f18-bf0c-eef3da49737c/69700989673.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 5616 bytes
SHA-256: 88e2916ccfc4c6be1b08267000f36bf69bf09f3184bf9c46588bb57eb7973acf
font_01_sfnt_off00010381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10381 10472 bytes
SHA-256: c3bd0c6e309aa29bf09c6adbbc9a9966d2f1eb899cafe68cf3bfe9ba313eabb5
font_02_sfnt_off00012752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12752 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3